Apparatus for coating articles.



L. W. FARMER- APPABATUS FOR COATING ARTICLESa APPLIUATION I'ILBD SEPT. 3, 1912.

Patented Nov. 17,1914

LUKE W. FARMER, OF SOMERVILLE, MASSACHUSETTS.

APPARATUS FOR COATING ARTICLES.

Specification of Letters Patent.

Patented Nov. 17, 1.914.

Application filed September 3, 1912. 7 Serial 1105718203.

T all whom it may concern Be it known that I, LUKE W. FARMER, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Apparatus for Coating Articles, of which the following is a specification.

In Letters Patent #999,789, dated August 8th, 1911, granted to A. R. Hussey, an apparatus is shown for coating paper cups and similar articles with paraflin-wax, aplurality of spraying-nozzles being employed to deliver the paraffin-wax in liquid form and at a high temperature upon the exterior of the cup. The cup-holder and spraying-nozzles are contained in a casing to confine the heat and the spray. As air is mixed with the liquid paraflin a vent opening is provided at the top of the casing for its escape, but in practice the air which passes out of said vent opening is laden wth the liquid paraifin and hence a pipe is employed to conduct the same to the open air. The fumes which escape are objectionable and the-amount of liquid paraflin which is held in suspension and carried away is considerable, and this invention has for its object to provide means to save a large proportion of the paraiiinwax and to reduce the objectionable odor of the fumes The invention consists in the provision of a condenser arranged above the sprayingapparatus into and through which the air,

laden with paraffin passes, and said condenser has numerous baffle-plates provided with holes through them for the passage of the air.laden with paraffin, and as the latter passes through the condenser the paraffinwax becomes congealed on the surfaces of said plates. The plates are removably supported so that they may be withdrawn and the paraflin-wax scraped oii or otherwise removed from them.

Figure 1 is a front elevation of an apparatus for coating articles embodying this invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a transverse horizontal section taken on the dotted line 3-3, Fig. 2, and Fig. 4 is a plan view of one of the baflie+plates.

0 represents a portion of the casing of the spraying-apparatus, 0 its top wall, a the discharge pipe extended upwardly from said top wall, and 0* a hinged lid to cover an opening in said top wall. Said parts are all substantially the same as in the patent aforesaid. A hood is arranged above the casing of the spraying-apparatus, which, as here shown, comprises a top wall 10, a side wall 12, the latter extending downward from the edge of the former for a short distance, all

around it, and for a portion of its length extending downward far enough to rest upon the top wall 0 of the spraying-apparatus,

or said hood may be otherwise supported in elevated position above the spraying-apparatus, so as to provide an opening at the front by which access may be had to the top wall of the spraying-apparatus, and the lid 0 may be' opened and closed for the introduction and removal of a cup or otherarticle. Said hood is connected with a discharge pipe 15 which extends upwardly to a condenser, which is supported by legs 16 at a suitable elevation above the hood. Said condenser is here shown of a particular construction whereby the paraflin with which the air is laden is congealed and thereby saved. Saidcondenser consists of a boxlike' structure having a bottom wall, upright side walls and a top wall, and it is made of thin sheet metal which serves as a good conducting medium for the heat. The discharge pipe 15 connects with the bottom wall, thereby to conduct the air laden with melted paraflin-wax to the condenser. Numerous baflie-plates 25 are arranged horizontally in the condenser-case at different elevations, which are made of substantially the'same area as the cross-sectional area of the condenser-case, and they are supported attheir sides upon ribs 26, fastened to the side walls of the condensercase. Said bafile-plates consist of flat sheet metal plates having perforations 27 at one end, and said plates are arranged in the condenser-case with their perforated ends disposed alternately with respect to'each other.

A tortuous passage for the air laden with melted paraffin-wax is thus provided. as represented by the arrows Fig. 2, and, while passing along said passage parafiin-wax becomes congealed on. the surfaces of the plates. The front wall of the condensercase is made to serve as a door, and is hinged at one side to the adjoining sidewall of the case and at its other side has a means to hold it closed. When said door is spraying devices including a hood having direct open communication with the spraying device and of a size to permit the expansion of the material delivered from such spraying device within the hood, a condenser case supported above and corresponding in sectional dimensions to that of the hood, a restricted communication between the condenser case and hood, a series of bafie plates supported in spaced parallel superimposed relation within the case, each plate being independently removable from the case, said case being formed with an opening and a door therefor through which opening the bafiie plates are removable.

In testimony whereof, I have signed my name to this specification, in the presence or" 30 two subscribing witnesses.

LUKE W. FARMER.

Witnesses:

Geo. BL. BLINN, LUCY M. LIND UIST. 

